#2 stems from the 'calories in/calories out' method of weight loss. It involves awareness of the amount of calories you eat and the amount of calories you burn.

#2 stems from the 'calories in/calories out' method of weight loss. It involves awareness of the amount of calories you eat and the amount of calories you burn. It's an adage to apply when trying to lose weight and just losing weight. It seems the same simplistic weight loss observation is being applied to nutrition, two vastly different things.